The fundamental dietary principle for the Paleo diet for athletes is simplicity itself-unrestricted consumption of lean meats, poultry, seafood, fruits and vegetables. Foods that are not part of the modern day Palaeolithic fare include: Cereal grains, dairy products, high glycemic fruits and veggies, legumes, alcohol, salty foods, high fat meats, refined sugars and all processed foods. Not only are grains and dairy poor sources of vitamins and minerals, they also yield a high glycemic load (see note below about glycemic load in the extended tab) and are net acid producing. Morevover, calcium intake from dairy, or any other food is only part of the story behind bone mineral health. More important is calcium balance, the difference between how much calcium goes into your body from diet and how much leaves in urine. Dietary acid base/balance is the single most important factor influencing calcium loss in urine. Net acid producing diets overloaded with grains, chesses and salty processed foods increase urinary calcium losses where as diets rich in alkaline-yielding fruit and vegetables bring us back into calcium balance and promote bone mineral health. For more about Grains and the Glycemic Load click on the "more here" link. Keep the questions coming and I'll try to respond the best I can! MachineMore about Grains: You may be aware that you can obtain all of the essential amino acids by mixing grains and legumes within a meal. Each of those food categories is lacking in one or more of the essential amino acids, but by eating them in in combination, the meal becomes more balanced. What is generally not explained, however, is that the volume of plant based foods one has to eat to get adequate daily protein requires eating considerable amounts of grains and beans because these foods are nutritionally poor. In addition, the contribute to blood acidity levels. A serious athlete attempting to get nearly a gram of protein per lb of body weight would net to eat all day long and have a gut that can process a significant amount of fibber. Even if he or she could do this, blood acidity levels would stay high and anti-nutrients would prevent the absorption of much of the limited micronutrients these foods have. Glycemic Load: One of the short comings of the original glycemic index was that it only compared equal quantities of carbs (50 grams) among foods to evaluate the blood glucose response. It didn't take into account the total amount of carbohydrates in a typical serving so the glycemic load multiplies the glycemic index by the typical serving to show a more accurate picture of the affects the food will have on your blood stream.